Stable microbubbles suspensions injectable into living organisms
First Claim
1. A dry pulverulent formulation which, upon dissolution in water, will form an aqueous suspension of microbubbles for ultrasonic echography, said formulation comprising one or more film forming surfactants selected from the group consisting of phosphatidic acid, phosphatidyl-choline, phosphatidyl-serine, phosphatidyl-ethanolamine, phosphatidyl-glycerol, phosphatidyl-inositol, cardiolipin, sphingomyelin, cholesterol, ergosterol, phytosterol, sitosterol, lanosterol, tocopherol, dicetyl-phosphate, propyl gallate, ascorbyl palmitate, butylated hydroxy-toluene and mixtures thereof in laminar form and one or more hydrosoluble stabilizers selected from the group consisting of linear and cross-linked poly- and oligosaccharides, sugars and hydrophilic polymers.
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Accused Products
Abstract
Gas or air filled microbubble suspensions in aqueous phase usable as imaging contrast agents in ultrasonic echography. They contain laminarized surfactants and, optionally, hydrophilic stabilizers. The laminarized surfactants can be in the form of liposomes. The suspensions are obtained by exposing the laminarized surfactants to air or a gas before or after admixing with an aqueous phase.
327 Citations
10 Claims
- 1. A dry pulverulent formulation which, upon dissolution in water, will form an aqueous suspension of microbubbles for ultrasonic echography, said formulation comprising one or more film forming surfactants selected from the group consisting of phosphatidic acid, phosphatidyl-choline, phosphatidyl-serine, phosphatidyl-ethanolamine, phosphatidyl-glycerol, phosphatidyl-inositol, cardiolipin, sphingomyelin, cholesterol, ergosterol, phytosterol, sitosterol, lanosterol, tocopherol, dicetyl-phosphate, propyl gallate, ascorbyl palmitate, butylated hydroxy-toluene and mixtures thereof in laminar form and one or more hydrosoluble stabilizers selected from the group consisting of linear and cross-linked poly- and oligosaccharides, sugars and hydrophilic polymers.
Specification